I chalk that up to bad parenting.
Like other FANTASY novels, it is fiction!
I'm not disputing the existance of the occult, that unfortuneately is very real.
But I just know that a novel or series that is Sci-Fi/Fantasy will not turn anybody into witches or wizards or turn them on to evil things unless the reader has the inclination to evilo in them in the first place.
And if anybody has a weak faith than maybe they shouldn't be reading HP or any other fantasy book.